The pens are offered in ballpoint, gel, and felt‑tip (marker) styles.
Listings typically call out quick‑drying or smear‑resistant ink and may include claims like “dries 3× faster” or drying times as short as five seconds. Look for those terms to identify pens that minimize smudging.
Erasable gel ink is thermo‑sensitive: friction from erasing makes the ink clear so you can rewrite. Note care cautions: exposure to high heat (around 140°F) can make the ink colorless, and very low temperatures (around 14°F) may restore color. Because of this sensitivity, erasable ink is not recommended for legal or official documents.
Both designs are available: many gel and erasable pens use retractable mechanisms, while some marker/felt‑tip pens come with caps.
Comfort features include rubber grips, full‑length cushioned grips, and hexagonal barrels designed to provide a steadier, more comfortable hold during extended writing.